Helped build one on top of cassandra at past employer - they’re still apparently happy with it. It’s something like 5-6 petabytes and handles millions of writes

Helped build one on top of cassandra at past employer - they’re still apparently happy with it. It’s something like 5-6 petabytes and handles millions of writes per second, hundreds of thousands (or maybe millions) of reads/traversals per second. Powers a successful and growing APT-hunting SaaS platform, and I’m still pretty proud of it, even though I don’t work there anymore.